November 30, 2014, 10:35 PM | #1 |
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COL question
so i threw together a box of .308 rounds the other day (180gr BST) and every recipe i could find called for 2.80 COL. however my mic is not digital and so the closest thing i could get is 2.75, however whenever i go to put the rounds in the magazine they dont fit as they are to long. the rounds shoot fantastically as they are (breech loaded).i can make them fit by seating them a bit deeper ,and so far i dont notice any performance changes but id like to be doing this right.so am i doing something dumb,or is it the magazine? help a brother out?
tikka t3 .308 -180gr Nosler BST |
November 30, 2014, 10:43 PM | #2 |
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If you are measuring 2.75" and they don't fit the magazine, the most likely thing is the measurement is wrong for some reason. Lay one down over a ruler. 2.75" is the same thing as 2 and 3/4 inches. See if it doesn't look longer than that on the ruler.
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November 30, 2014, 11:02 PM | #3 |
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I've gotta ask, since you're kind of challenged in the caliper department, are you sure that your cases aren't longer than maximum length?
If your mag is proper for that rifle/cartridge, about all you can do is seat a little deeper till they fit. jd
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November 30, 2014, 11:03 PM | #4 |
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i just double checked they are indeed at 2.75>x they would fit perfectly if the ballistic tip wasnt there.
jd- cases are factory new, and only neck sized and trimmed magazine is also correct. and yes they are seated somewhere in the 2.7 range Last edited by screaming4vengence; November 30, 2014 at 11:08 PM. |
November 30, 2014, 11:23 PM | #5 |
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December 1, 2014, 12:35 AM | #6 |
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can you post a picture with a round in the caliper?
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December 1, 2014, 12:37 AM | #7 |
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So how deep do you have to seat them in order to fit the magazine?
Have you contacted Tikka to find out if this is a normal condition? Have you had this issue with other 180gr ammo, factory or otherwise? Looking at the Hodgdon Load Data, I notice there are quite a few powders listed with compressed max loads. This could become an issue if you seat the bullet deeper than the test load. I would be on the phone to Tikka for an explaination and a new magazine (or two). That is of course if you are reading your calipers correctly.
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Brad
Last edited by Barnacle Brad; December 1, 2014 at 12:45 AM. |
December 1, 2014, 05:45 AM | #8 |
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I seat my Hornady 150 SST bullets at 2.75 along with other ballistic tip bullets. 180's may be slightly longer.
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December 1, 2014, 07:50 AM | #9 |
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If you're measuring correctly, contact Tikka as something's wrong with the DBM. Any .308 class mag should be able to handle 2.8 "plus".
I don't know if the T3 is compatible with AICS type mags, but if so there are aftermarket mags that will allow 2.9"+ for long throats and VLD's. Type of bullet, seating depth, etc. is all irrelevant here. Overall length is overall length...
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December 1, 2014, 05:16 PM | #10 |
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The load is not even close to compressed 40gr of xbr8208. I'll get on the phone with tikka, I promise I'm reading the caliper right ( double checked with a ruler as well)
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December 1, 2014, 10:28 PM | #11 |
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Screaming, I'm sure you've heard this many times but, there are no stupid questions, other than the ones you don't ask. I think this is especially true in reloading.
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December 1, 2014, 10:29 PM | #12 |
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Screaming, I think you have a very good excuse to buy another gun for testing.
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